BioThane® 1.5m Walking Lead | Single-Colour Walking Lead NZGoldilocks length. 1. 5m of single colour BioThane walking lead a touch more room than the standard 1. 2m, still all the control. 1. 5m is becoming the new walking standard for a reason. The extra 30cm over a 1. 2m lead gives your dog enough room to walk a half step ahead without pulling, enough slack for sniff stops without the lead going tight, and enough length to loop and walk hands free for a stretch on a quiet path. Still short enough for real